27810442165 has 12 divisors (see below), whose sum is σ = 36682203852. Its totient is φ = 20225775680.

The previous prime is 27810442159. The next prime is 27810442181. The reversal of 27810442165 is 56124401872.

It can be written as a sum of positive squares in 2 ways, for example, as 5235680164 + 22574762001 = 72358^2 + 150249^2 .

It is not a de Polignac number, because 27810442165 - 2¹¹ = 27810440117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22983232 + ... + 22984441.

It is an arithmetic number, because the mean of its divisors is an integer number (3056850321).

Almost surely, 2^27810442165 is an apocalyptic number.

It is an amenable number.

27810442165 is a deficient number, since it is larger than the sum of its proper divisors (8871761687).

27810442165 is a wasteful number, since it uses less digits than its factorization.

27810442165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45967700 (or 45967689 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 27810442165 in words is "twenty-seven billion, eight hundred ten million, four hundred forty-two thousand, one hundred sixty-five".